<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="../vue/vue.js"></script>
</head>
<body>

<div id="app">
    <input type="text" @keyup.ctrl="change">
</div>

<script>

    Vue.config.keyCodes.ctrl=17;
    new Vue({
        data:{

        },
        methods:{
            change(){
                alert('改变了')
            }
        }

    }).$mount('#app')
</script>

</body>
</html>